Recovery of procaine from biological fluids.

This research article examines the recovery process of procaine, a local anesthetic, from biological fluids using an improved extraction method which yields essentially 100% recovery from equine plasma and urine.

Objective of the Research

• The main objective of this research is to improve the process of procaine recovery from biological fluids. The researchers analysed a previously published recovery method that used 5M NaOH (sodium hydroxide) for procaine extraction from human plasma, which proved to result in poor recoveries.

Investigation and Findings

• The researchers found that under the previously recommended extraction conditions, procaine was rapidly hydrolysed, indicating a potential reason for the low recoveries.

Proposed Solution

• The researchers proposed a revised extraction method. They suggested extracting procaine into benzene while buffering the samples to a pH level of 9.0.
• The buffering agent used was a borate buffer, a reagent which helps maintain a stable pH level during biochemical reactions.

Results

• Testing this proposed method with equine plasma and urine, they achieved near 100% procaine recovery, making this a significantly improved method compared to the previously used one.

Implications

• The outcome of this research implies an enhanced methodology for procaine recovery from biological fluids.
• While the testing was performed on equine samples, the results may potentially be applicable to other mammals, including humans. However, further research would be necessary for this conclusion.